The benefit with LEDs never has been cost... and likely won't be for a long time, if ever. You'll get a lot of light for very little electricity used, little to no heat, and no extra noise or electricity consumed from cooling. You'll also probably get rid of the tank before the LEDs need replacing.
LEDs are made in all different types of spectrum, from 5000k to single spectrum blues. Get ~6500k LEDs, use 1W LEDs for PC equivalence, use 3W if you need anything more. A prefab unit may work depending on how your fuge is set up. BoostLED's PAR reef lamp would probably be the easiest solution, screws into any existing E26/E27 socket.
There are lots of options... many people say cheato needs a lot of light and flow to grow. Not sure myself, but the LEDs will definitely give you intensity.